I'm still looking for some input on the Ecoboost. I heard today that Summitt makes a chip that will increase my mileage. I'm trying to get better mileage but so far no luck. I understand all the variables. Listen, I'm running a 2012 F150 supercrew, 4x2 with the V6 Ecoboost. I'm driving city and hwy and my mileage is averageing 17.5. Not loaded, not towing, 2 passengers and my dog. I have 10,000 miles on the truck. My longest trip was a 5 hr. Interstate hwy. It got up to 18.9 on that trip and fell back to 17.5 once we got back to short hauls. We frequently take 2.5 hr. trips and the mileage stays the same. I drive very easy on the throttle and use the cruise as much as possible. I would like to find out if Ford can help me with the "chip" or am I on my own. I'm convinced the truck will do better, I just need to know how. The service manager ask my wife if she was happy with the mileage last week when we had our first oil change at 10,000 miles. She expressed her dissatisfaction and his reply was " It'll get better". Hogwash, I don't think so. Not by adding miles. There must be something we can do besides just accepting that this is the way it is. If you can help me, please, I would like to know. I love the truck.

I know that cruise is usually touted as giving better mileage, but not always true. I find that on larger hills, the cruise can be a bit slow to respond on many vehicles, which will rob you of efficiency. Also, what speeds are you driving? Fuel mileage goes down at higher speeds, the most efficient is not going to happen at 70 mph.
As far as Ford helping out with any aftermarket chip, not going to happen, and you also have to be careful as adding such things can void warranty. You could inquire if there have been any updates, but there may not be. As also mentioned, final gears in the axles can also affect what you get for actual mileage over what the sticker says is the rated mileage.

I have seen mileage change after 20,000 miles though. The Edge has improved, and I know I will likely catch a little over this, I have observed a slight increase with using synthetic vs conventional. Generally only good for 1-3 mpg though.

If it was me...I would not be happy with 17mpg with a 6cyl sorry guys,i dont care if its a truck or not..heck im seeing 17.9 with a V-8 in a half ton extended cab 4x4 with over 130,000 miles,Bone stock(no its not a Ford sorry to say that).....Now i would be looking into air intake upgrades that wont affect warrenty issues along with some kind of free flowing dual exhaust setup..gotta get that baby breathing better....imo that ecoboost should be producing much better numbers than 17-18 mpg's.....The Factory has definitly left room for imrpovement from my perspective.....Also a tuner is not a bad idea IF you intend on keeping the rig long term and do towing with it.it gives you tunable options,for your needs...which superseeds a custom tune by itself....once it is done your stuck with how the peramiters are setup.

I was down at the ford dealer the other day drooling over a new F-150. But with the numbers your guys are seeing, I think ill stick with the super duty.

I drove from North Dakota to North Idaho, that's over 2 HUGE mountain passes, and averaged 18.6 according to the scangauge. I didn't back my numbers up but for the most part the avg mpg on the scangauge is pretty tight. Now I am comparing apples to oranges, since the diesel isn't stock. But its also a Crew Cab Long Box with a Fiberglass Canopy and Bed Liner with 35" Tires and a small lift. So if the ecoboost was running that same set up, I would expect the mileage would be awful. Hell my hemi dodge average 15-16mpg, and my 85 F-150 gets 20.